Many, many ways to do so, but basically boils down to what you like with the choices being:
1. Get rid of whatever is on the wood now, then: Do Nothing
2. Use teak oil, regularly
3. Use varnish
4. Use cetol or other types of replacements for varnish.
If you want to consider non-varnish choices, just google or search on "cetol" or "varnish" and you'll have enough to read until next Christmas!


I invite you join our C34IA and our message board:
http://c34.org/bbs/index.php?board=11.0